FLUX 3 Upscaler
FLUX 3 Upscaler is a dedicated video enhancement model from Black Forest Labs for increasing source footage to 1080p, 2K, or 4K while preserving motion and the original audio track. It supports a source-faithful precise mode for faces, products, and brand-sensitive footage, plus a more creative enhancement mode that restores and invents finer detail for generated clips, scenery, textures, and crowd shots. The endpoint accepts clips up to 20 seconds long and can optionally use a prompt to steer the type of detail it enhances.
Precise and creative enhancement
How to use FLUX 3 Upscaler's settings.creativity: precise, source-faithful sharpening for faces and brands, or creative detail restoration for scenery, textures, and crowds.
Steering the enhancement with a prompt
How to steer FLUX 3 Upscaler with an optional positivePrompt: name the materials and textures you want rebuilt so the enhancement favours the detail that matters.
Upscaling video
How to upscale video with FLUX 3 Upscaler: the async request, choosing an upscale factor, the input size and length limits, and keeping motion and the original audio.